Open AccessEffect of Al Doping on Magnetic Properties of Co-Mn Nanoferrites Synthesized via Citrate-Gel Method
Author(s) -
Shankar Barapati,
M. Raghasudha,
P. Veera Somaiah
Publication year - 2021
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2021.23152
Subject(s) - crystallite , spinel , analytical chemistry (journal) , aluminium , ferrite (magnet) , doping , fourier transform infrared spectroscopy , chemistry , magnetization , band gap , materials science , nuclear chemistry , metallurgy , chemical engineering , crystallography , magnetic field , composite material , chromatography , physics , optoelectronics , quantum mechanics , engineering , organic chemistry
The structural and magnetic properties of aluminium substituted Co-Mn nanoferrites synthesized viaa chemical route viz. citrate-gel autocombustion method have been reported. Aluminium content hasbeen varied from x=0 to x=1 with an increment of 0.2 in Co0.75Mn0.25AlxFe2-xO4. The structuralconfirmation was done with the basic characterization techniques such as XRD study, FTIRspectroscopic and the surface morphology was examined using SEM and EDX spectroscopic analysis.To study the optical absorption behaviour of the prepared ferrites, UV-visible spectral analysis wascarried out. XRD analysis established the formation of cubic spinel structure of the materials with theaverage crystallite size of 15.5 nm to 19.94 nm. FTIR spectra has shown two absorption peaks that arecharacteristic of spinel nano ferrites. From the UV-visible spectral data, energy band gap (Eg) valueswere evaluated. The data witnessed an increase in the Eg value of the ferrite by doping of Al3+ ion intothe ferrite. Room temperature magnetization measurements were carried out before and after aluminiumdoping in the samples using vibrating sample magnetometer. It was revealed that the substitution ofaluminium in the lattice has modified the material into a soft magnetic material. Consequently, theyfind applications in transformer and motor cores.